package Text_52;

import java.util.Scanner;

public class Code {
	public static void main(String[] args) {
		//检测大写字母
		Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个字符串：");
        String str = sc.next();
        System.out.println(Choose(str));

    }
    public static boolean Choose(String str){
        for(int i=0;i<str.length();i++) {
            char c = str.charAt(i);
            //System.out.println(c);
            if(c>97&&c<122){
                return false;
            }
        }
        return true;
    }
}
